The standard deviation of four-nozzle impinging flamenoise was greater than that of the two-nozzle impinging flamenoise, but the change of the standard deviation was the reverse.
Combustion of powdered coal in furnace is a very complicate suspension firing process. Noise interference must be overcome to achieve clear image of flame monitoring system.
锅炉中煤粉的燃烧过程是非常复杂的悬浮燃烧，炉膛火焰监视必须克服监视图像的噪声。
3
The rocket exhaust plume causes the effects of noise, smoke, flame and heat radiation, environment pollution and signal attenuation, etc. So it is important to study exhaust plume.